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(No Model.) 4 SheetsSheet 1.

E. H. PARKS.

BORING MACHINE.

No. 323,723. Patented Aug. 4,1885.

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INVENT'EI'RI maegwgw -1- wwu Nv PETERa PhowLnha ra lwr. Washington. DJ;-

(No Model.) I 4.Sheets-Sheet 2.

E. H. PARKS.

BORING MACHINE.

No. 323,723. Patented Aug. 4, 1885.

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(No Model.) I 4 Shets-Shebt 4.

E. H. PARKS.-

'BORING MACHINE. No. 323,723. Patented Aug. 4, 1885.

v WI NESSES INVENTD'R N. PETERS. Phnlolflhcgnphor. Washingtun. 11c.

UNITED STATES PATENT FFICEOQ EDWARD H. PARKS, OF PROVIDENCE, -RHODE ISLAND, ASSIGNOR TO THE BROWN 80 SHA'RPE MANUFACTURING COMPANY, OF SAME PLACE.

BORING-MACHINE.

SPECIFICATION forming part of Letters'Patent No, 323,'723, dated August 4, 1885.

Application filed June 26, 1 885. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD H. PARKS, a citizen of the United States, and a resident of the city and county of Providence, and State 5 of Rhode Island, have invented an Improvement in Ohucking-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representinglike parts.

This invention relates to chucking-machines of that class employing a revolving table to receive the work to be operated on, while the head of the machine is provided with a recip rocating slide carrying a turret to contain tools of various kinds, the said turret being adapted to be rotated on the slide, and. to be locked thereto, to enable different tools to be presented to the work secured upon the revolving table.

Heretofore in such machines, so far as my knowledge extends, the table has been rotated in a vertical plane on a horizontal axis, while the turret-carrying slide has reciprocated in a horizontal plane. This has made it ditficult to secure the device or thing to be operated onsuch, for instance, as a fiy-wheel-upon the table, and when secured the strain incident to the weight of the device was exerted upon the holding means employed to retain 0 said work on the table.

The object of my invention is to provide a chucking-machine of the class designated,with a table adapted to rotate in a horizontal plane on a vertical axis, said table having a central bore or opening to obtain constant clearance for chips, and in connection with said table to provide the head of the machine with avertically-reciprocating slide carrying a turret, as well as to provide means for balancing the reciprocating slide in the head. A further object is to provide the central bore of the horizontal table with a screw-threaded sleeve, and with means to raise or lower said sleeve with relation to the table, to afford a rest or support at its center for such pieces of machinery or other devices which, on being placed upon the table, would not, by reason of their form or configuration, rest on the table at or about its center, as in the case of a fly or bandwheehwherein the hub to be bored is of less length than the fvidth of the rim,

which would thereby necessarilyfind support on the table at its rim only were it not for my invention. Further, as is well known, in machines of the class mentioned the reciprocating slide is providing with a locking-pin which enters a socket in the turret to lock or hold said turret in required position for the correct presentation of one of its tools to the device to be drilled or otherwise operated on, while the head of the machine has a stationary tripping-dog which, during the upward movement of the slide, operates a spring-actuated lever pivoted to said slide, said lever thereupon withdrawing the locking-pin connected therewith from its socket in the turret to release the latter and permit its rotation on the slide. By reason of the tripping-dog being stationary or firmly fixed to the head, it has heretofore been necessary to move the slide its full stroke in the head in order to disengage the locking mechanism and release the turret to permit the latter to be partially turned on its axis and enable a second tool to be presented to the work placed on the table.

One of the objects of the present invention is to provide an adjustable or movable tripping-dog, and meansfor adjusting said dogin the head, so that, when desired, and upon adjustment of the dog, it is only necessary to move the slide a partial stroke to cause the locking-pin to be withdrawn from the turret to release the same. I

A still further object of my invention is to provide a tool-guide adapted to be adjusted in the head of' the machine and to be clamped thereto, the said tool-guide embracing or engaging a tool to retain it in proper position as against spring or vibration thereof while 0 being used in drilling or boring. Thisis more essential in relation to tools of some length, and when the cored hole in the hub of the flywheel, for instance, is not concentric with its rim, thereby necessitating a greater amount of metal to be bored or drilled out at one side of said cored hole than the other, the tool in such case having a tendency to'follow the cored hole, and thus depart from its properposition.

The object of the tool-guide is to prevent all such spring or divergence of the tool from its correct position.

The invention is more fully set forth in the following description and claims.

Referring to the drawings, Figure 1 is a side elevation, partly in vertical section, of a machine embodying my invention; Fig. 2, a detail to be referred to; Fig. 3, an enlarged detail in elevation and section of part of the table and head, showing as well the slide-turret and toolguide. Figs. 4 and 5 are details of parts of the tool-guide; Fig. 6, a vertical section of part of the head, to show certain details of construction; Fig. 7, a front elevation of the headwith the slide removed; Fig. 8, a partial sectional view of the head, to show the turret-locking pin and lever and the adjustable tripping-dog; Fig. 9, a detail to be referred to, and Fig. a plan view of the machine.

The base Alias an attached column or standard, B, having head 13, and is provided with a bearing, a, to receive the hollow spindle c of the table 0, revolving in a horizontal plane, the loose friction-collars 0' being interposed betweerrthe upper end of the bearing a of the base and the under side of the revolving table 0, to distribute friction, as is well understood. The under side of the table 0 is provided with a bevel-gear, c", to engage with a bevel-pinion, c, fixed on the driving-shaft 2, having hearings in the base A,and receiving the conepulley 3, to enable the shaft to be driven. The revolving table is provided at its center or bore with a sleeve, 0, which is screwthreaded on its outer surface and engages with a geared and threaded nut, d, said geared nut meshing with teeth out on the inner end of a shaft, d, which atits outer end extends through the bearing (1 to the rim of the table, where it is adapted to receive a soeketwrench. (Not shown.) By this means the shaft may be rotated to move the nut d, and thus in turn raise or lower the sleeve 0.

In Fig. 3 the sleeve is shown in partly raised position to bring the bushing 7 (inserted in the bore of the sleeve) against the under side of the hub 4 of the band or fly wheel 5, which is placed on the table, thereby giving support to said hub when operated upon by the tool, and which also enables the feed of the tool to be increased to obtain more speedy results. Theslide E has a reciprocating movement in a vertical plane and is provided with a turret, F, of ordinary construction, the said slide being balanced in the head by means of the weight f, having chains f running over the rollsf f, respectively secured to the standard B and head B, the said chains being attached to the slide atf', as shown in Fig. 6. The balancing-weight f enables an operator to more easily adjust the slide in the head. The lever g pivoted to the slide E receives a pin, g, which projects through the said slide (see Fig. 8) and enters a socket in the turret in the usual manner to lock or hold the turret to said slide as against rotation, the lever being engaged by a spring, h, the tendency of which is to force the pin forward into the turret. A groove, 9, is made in the head 13, as shown in Fig. 8, which receives a rack-bar, 9 having a projection, g, at the upper end, the said rack with its projection serving as a tripping-dog in lieu of the common or wellknown stationary tripping-dog heretofore employed. The rack-bar is engaged by a pinion, g", on the inner end of the shaft extending through one side of the head and receiving a knurled head, g keyed thereto and inclosing aspringyg which constantly forces the knurled head against the outer toothed surface of the bushing t" firmly secured in the head 13. The inner end of the knurled head is also provided with teeth or serrations to engage the teeth of the bushing t, and thus serve as a clutch or locking device to retain the pinion g and rack g in adjusted position.

When it is desired to raise or lower the tripping-dog, the head is drawn outward as against the action of the coiled spring 9*, to disengage its teeth from the toothed bushing, when said head is turned to operate the pinion 9, and thus in turn to raise or lower the tripping-dog to any desired position. By such adjustment it will be noticed that the upper end of the lever pivoted to the slide will sooner or later strike the projection g of the tripping-dog and cause the withdrawal of the pin 5 from the turret F, whereby the said turret may be turned to permit different tools to be presented to the device operated on without causing the slide to be moved its entire stroke. The tripping-dog is shown in front elevation, Fig. 7, wherein the slide is removed. Vhen the slide is in its proper position in the head, it bears against the flange h on the side of the tripping-dog, to retain it in the groove h as against being forced for-. ward by the action of the pinion during ad justment. The tool-guide K is attached to the stem 7:, which is held in the head B by the clamp is, having adjusting-screw k to en able the tool-guide to be raised or lowered and retained in adjusted position. The rear end of the tool-guide moves in the groove k planed in the face of the standard A, while the forward endof the said tool'guide has in the present instance two plates, In", bolted thereto and adapted to enter the grooves is cut in the tool It, on opposite sides thereof, the said plates firmly holding the tool as against spring or vibration in any direction, while at the same time permitting said tool to be raised or lowered.

The mechanism for operating the slide which carries the turret is of usual construction, and consists, briefly, of the upright shalt 121., having hand-wheel m, bevel-pinion m, meshing with bevel-gear m on shaft m, having bearings in the head of the machine and provided with the gears m, which mesh into the racks m, (see Fig. 6,) secured to the back of the slide E, so as to enable the slide to be operated by hand. The slide is automatically operated by means of the band passing about the pulley a on shaft 2, (see Fig. 1,) and disk ICC n 011 shaft 72 having bearings in the arm 11;, and provided with spring a and adjustingnut a (See Fig. 2.) The disk at is engaged by the friction-roll W, on cross-shaft a (see Fig. 10,) secured in bearings a attached to the standard B. This shaft has a bevelgear, of, engaging the bevel-gear n on rear end of the worm-shaft 0, which at said end has bearings in the yoke 0 retained on the shaft 71., as shown in Fig. 10. The worm-shaft 0 extends toward the forward part of the head B and receives the worm 0 (see Fig. 7 and dotted lines, Fig. 6 which meshes with the wormgear 0 fast on the shaft m as clearly shown in Fig. 7. The forward end of the worm-shaft 0 is supported by the yoke 12, having a stem, 1), adapted to be moved vertically in the bracket p An arm, p (see Fig. 7 and dotted lines, Fig. 6,) enters a slot in the stem 1), and is fast on the shaft 12*, having bearings in the head B back of the slide, said shaft at the opposite side of the head 13 receiving a cranklevcr, 1', (see Fig; 1,) which is engaged by the spring-actuated catch This catch holds the lever r and connected mechanism in adjusted position to keep the worm in engagement with the worm-gear. Upon withdrawal of the springactuated catch 5 the crank-lever is released and the worm falls away from the worm-gear by gravity,thus preventing further automatic feed of the slide.

The catch may be operated by hand through the aid of the thumb-piece .9, (see Fig. 9,) or automatically by means of the spring-actuated pin 5 having a wedge-shaped inner end to enter a mortise in the stem of the springcatoh, the said pin 8 being forced back into the head as against the action of the spring 5", to cause the retraction of the spring-catch by means of the nut 75, adj ustably secured in the slot 25 in the side of the slide E, as clearly indicated in Fig. l.

The nut may be so adjusted as to discon nect the slide from its automatic feed at any given point in its downward movement, as is well understood.

I claim 1. In a chucking-machine, the bed provided with a horizontal table having a central bore,

and adapted to be rotated as specified, combined with a head having a vertically-reciprocating slide provided with aturret,substantially as set forth.

2. In a chuckingmachinathe bed provided with a horizontal table having a central bore and adapted to be rotated, as specified, combined with a head havinga vertically-reciprocating slide provided with aturret and a ballance-weight, substantially asset forth.

8. The horizontal table provided with a cen- 6o tral bore and screw-threaded sleeve, ageared nut, and means to operate said nut to raise or lower the sleeve, substantially as set forth.

4. The combination, with the head having a reciprocating slide provided with a turret, and with a pivoted lever having a locking-pin to engage the turret, as specified,of a trippingdog havinga toothed extension or rack, and means for raising or lowering said tripping-dog in the head, for the purpose specified.

5. The head provided with a reciprocating slide having a turret, and a pivoted lever having a pin to engage the turret, combined with a tripping-dog having a rack and adapted to slide in the head, the pinion and its shaft, and means for locking the shaft in required position, as set forth.

6. The head provided with a clamp, as specified, and the tool-turret, combined with the tool-guide, having a stem to enter the clamp, and provided with jaws to engage a tool of the turret, in the manner and for the purpose described.

7. The head provided with the clamp and the turret, having tools with grooves therein, as specified, and the standard having the groove k combined with the tool-guide provided with the stem, the jaws, and the rearward extension, substantially as and for the purpose set forth. 9

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing witnesses.

EDVARD. H. PARKS.

Witnesses:

HOWARD GREENE, J AS. H. LANGE. 

